3.說明原因常用的句型

　　There are two/some good reasons for sth./to do sth...

　　There are two reasons for the changes in people�餾 living conditions.

　　First, we have been carrying out an opening and reform policy. Second, our national economy is developing rapidly and the birth rate has been controlled.

　　生活條件改變的原因有兩條。首先，我們一直在貫徹執行改革開放政策。其次，我們的經濟在迅速發展并且出生率得到了控制。

　　We have two good reasons for/against...

　　We have two good reasons against the uncontrolled development of industry.

　　我們有兩條充分理由反對工業不受控制的發展。

　　The reason for...is that + 從句

　　The reason for us to support the “Project Hope” is that many children in poor areas couldn�餿 afford different kinds of expenses to continue with their schooling.

　　我們支持“希望工程”的原因是, 許多貧困地區的兒童付不起繼續學業的各種費用。